My good friend is a HUGE fan of theirs and has traveled around North America to see their shows. Heck, she's in Korea right now, and I believe have caught a number of their performances there too..
That is dedication!
I am quite partial to Kpop too, SNSD (Girl's Generation) in particular. I love how being a Kpop fan is really engaging. I would love to go to some Kpop concerts in Korea! But I don't think I could be as dedicated as your friend and travel everywhere they go to see them! That's cool!!